Can-opener



('NoModel.)

C.S.HOPPER. CAN OPENER.

No. 573,465. Patented De0.22, 1896.

UNITED STATES ATENT FFICE.

CHARLES S. HOPPER, OF PHILADELPHIA, PENNSYLVANIA.

CAN-OPENER.

SPECIFICATION forming part of Letters Patent No. 573,465, dated December22, 1896.

Application filed omel- 7,1896. Serial No. 608,106. (No model.)

To all whom it may concern.-

Be it known that 1, CHARLES S. HOPPER, a citizen of the United States,residing at Philadelphia, (Germ antown,) in the county of Philadelphiaand State of Pennsylvania, have invented certain new and usefulImprovements in Can-Openers, of which the following is a specification.

My invention has relation to a can-opener of the type or class wherein adisk provided with a central pin is also provided with a cutting-bladearranged radially with respect to the pin, and in such connection itrelates particularly to the construction and arrangement of such acan-opener.

The principal objects of my invention are, first, to provide in acan-opener a disk having a central pin adapted to enter the face of thecan, the disk being radially slotted for the reception of acutting-blade which is adj ustable in the slot radially with respect tothe central pin, and, second, to provide in a canopener a disk theperiphery of which is scallopecl and having a radial slot and centralpin and ablade adapted to be adjusted in the slot and to be secured tothe disk by means of a thumb-nut.

My invention, stated in general terms, consists of a can-openerconstructed and arranged in substantially the manner hereinafterdescribed and claimed.

The nature and scope of my invention will be more fully understood fromthe following description, taken in connection with the accompanyingdrawings, forming part hereof, and in whicl1- Figure 1 is a perspectiveview of a canopener embodying main features of my invention. Fig. 2 is atop or plan view of the can-opener. Fig. 3 is a longitudinal section onthe line 00 a: of Fig. 2, illustrating the canopener in operativeposition upon a can and Figs. 4 and 5 are respectively a side elevationand an enlarged underneath plan View of the adjustable blade.

Referring to the drawings, (t represents a disk of metal, wood, or otherfirm material and having its periphery scalloped or cut out, as at a. Atthe center of the disk is secured a pin b, projecting downward from thedisk. In the disk is out or formed a radially-ar ranged slot or guideway61, in which the stem V e of a cutting-blade f is adapted to be guided.

The steme is screw-threaded and projects through the slot above the topsurface of the disk a, and is adapted to receive a thumb-nut g. Theblade f has a point f, and is so ground that the surface f nearest thepin 1) is fiat, whereas the outer surface f is curved or beveled, asclearly shown in Fig. 5. The blade f is also provided with a shoulder fwhich rests on the under surface of the disk at when the thumb-nut g isadvanced on. the stem 6, and through the clamping action of the shoulderf and the nut g the blade f is secured or fixed in its required positionin the slot d of the disk.

In operation the blade f is first secured in the slot cl of the disk toin its required position, which will depend upon the size of thecircular opening to be made in the can b, and also of course upon thediameter or size of the head 7t of the can. The disk is then pressedfirmly into the head h of the can, the pin 1) and blade f penetratingthe head h, as indicated in Fig. 3. The disk Ct is now turned by hand,the scalloped periphery a affording a firm hold upon the disk. As theblade f turns, the metal of the head it is sheared, and the peculiarform of the blade f permits the metal to be cut with a straight edgealong the piece to be cut out and a downwardly-projecting curl or flange7t on the part of the head 71/ remaining on the can.

Having thus described the nature and objects of my invention, what Iclaim as new, and desire to secure by Letters Patent, is-- Thecombination, in a can-opener, of a disk provided with a scallopedperiphery adapted to afford a firm hold in the turning thereof and witha fixed pin or spur, and an oblong slot in the body thereof, acutting-blade provided with a shouldered and threaded stem, said bladehaving a fiat surface on one side and a curved or beveled surface on theopposite side of the same and a thumb-nut adapted to be advanced on thethreaded portion of the stem of said blade, substantially as shown anddescribed.

In testimony whereof I have hereunto set my signature in the presence oftwo subscribing witnesses.

OIIAS. S. HOPPER.

IVitnesses:

J. WALTER DOUGLASS, THOMAS M. SMITH.

